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Finding the Fourth Proportional to 656.99, 985.54 and 218.23

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Solution

The fourth proportional to 656.99, 985.54 and 218.23 is: 327.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.99 : 985.54 = 218.23 : x
  2. Step 2: Convert to fraction form
    656.99/985.54 = 218.23/x
  3. Step 3: Cross multiply
    656.99x = 985.54 × 218.23
  4. Step 4: Simplify right side
    656.99x = 215,072.20
  5. Step 5: Solve for x
    x = 215,072.20/656.99
  6. Step 6: Final answer
    x = 327.36

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.